Question: When did Scotland have a population of 5.3136e+06?
Paraphrase: What year was Scotland's census 5.3 million?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q22 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '5.3136e+06')) . ?s pq:P585 ?value}